Exchange rate of the US greenback vis-a-vis the Kuwaiti dinar dropped to KD 0.281 per dollar on Wednesday, while the euro rose to KD 0.387, said the daily exchange rate bulletin of the Central Bank of Kuwait. The bulletin said the pound sterling also rose to KD 0.456 and the Swiss franc up to KD 0.314, whereas the Japanese yen stood at its long-held notch of KD 0.003